Consider the following C program segment where CellNode represents a node in a…

Consider the following C program segment where CellNode represents a node in a binary tree:

struct CellNode 
{
  struct CellNode *leftChild;
  int element;
  struct CellNode *rightChild;
};

int GetValue(struct CellNode *ptr) 
{
  int value = 0;
  if (ptr != NULL) 
  {
   if ((ptr->leftChild == NULL) &&
        (ptr->rightChild == NULL))
      value = 1;
   else
      value = value + GetValue(ptr->leftChild)
                   + GetValue(ptr->rightChild);
  }
  return(value);
}

The value returned by GetValue() when a pointer to the root of a binary tree is passed as its argument is: